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					Public Health & Environmental
           Services
Pollution Control Division



                  Ozone Alerts in the
               Houston/Harris County Area

                               Jerry L. Harris
                         Air Sampling Coordinator
                       Harris County Pollution Control
What is Tropospheric Ozone
  and Why do we care?
   Ground level ozone
   Decreased pulmonary function
   Pulmonary deficient especially susceptible
   Children and elderly at higher risk
   Described as “sunburn”of the lungs

                 Public Health & Environmental
                            Services
                 Pollution Control Division
Public Health & Environmental
           Services
Pollution Control Division



              Why do we need ozone alerts
               in Houston/Harris County?

                                The eight-county area is
                                        SEVERE
                                Non-attainment for ozone
Public Health & Environmental
           Services
Pollution Control Division



            2003 Ozone Exceedance Days
       1-hour exceedances            8-hour exceedances
       ================              ============
            Orange             24      Orange 22
            Red                10      Red    18
            Purple              1      Purple  4
       -------------------------
                                     ----------------------

            Total              35      Total          44
             ONE-HOUR OZONE EXCEEDANCE DAYS in H-G-B REGION
             (all monitor sites)                                                          total most      Los
                                                                                   total unique days at Angeles
                                                                                   days hours one site AQMD

                               May




                                                 Aug




                                                                   Nov
                                                       Sep




                                                                         Dec
                   Mar
             Feb




                                     Jun
                         Apr
       Jan




                                                             Oct
                                           Jul
                                                                                   ==== ===== ====== =====

2000     0     1     0     3     2     1     9   15      9     4     0     0   =    44     164         16    40
2001     0     0     1     1     2     9     4    6      4     3     2     0   =    32      93         10    36
2002     1     0     1     2     0     6     3    5      6     2     0     0   =    26      71          5    49
2003     0     0     2     3     5     3     5    6      7     4     0     0   =    35     132         10    68
2004     0                                                                     =     0       0          0     0

Ave = 0 0 1 2 2 5 5 8 7 3 1 0                                                            16-Feb 2004
             Current outdoor Ozone level in parts per billion

     0-79             Little to no risk involved today
    Good

  80-124              Moderate health concern for sensitive
 Moderate             people

 125-164              Sensitive health groups may
Unhealthy             experience respiratory effects
    for
Sensitive
   165-204            Everyone may experience health
Unhealthy             effects
        y
  Over 205            Everyone may experience serious
     Very             health effects
 Unhealthy
Public Health & Environmental
           Services
Pollution Control Division


             AQI and 8hr - 1hr Ozone Alert
                     Comparison
                    AQI           8-hr          1-hr

Green 01--50 Healthy                01- 64         ----
Yellow 51-100 Moderate              65- 84          ---
                                  ( trigger ) in ppb
Orange 101-150 Sensitive           85-104 125-164
Red    151-200 Unhealthy          105-124 165-204
Purple 201-300 Very Unhealthy     125-300 205-404
Maroon 300-500 Hazardous          301 - + 405-604
Public Health & Environmental
           Services
Pollution Control Division




                 Houston/Harris County Area
                Unique         meteorology – coastal
                Unique         geography – large flat
                 coastal
                Unique         demographics – 5 ¼ million
                Unique         chemistry – petrochemicals
Houston Ship Channel
Petro-chemical Industry
Houston Transportation Area
12,500 sq miles – 5 ¼ million people
Public Health & Environmental
           Services
Pollution Control Division




            Mitigation of Health Impacts

                                       Elderly
                                      Children
                                Respiratory diseases
Public Health & Environmental
           Services
Pollution Control Division




          Mitigation of Ozone Precursors

                               Industrial activities
                               Vehicular travel
                               Fueling times
Public Health & Environmental
           Services
Pollution Control Division



                How to communicate ozone
                 exceedances to the public
                      Email notifications from TCEQ
                      Refined emails from HCOEM
                      Press releases for red and purple alerts
                      Highway electronic signs
                      Monitor reading displays
                      Phone advisories to ISDs
Public Health & Environmental
           Services
Pollution Control Division


                Harris County Public Health
                Ozone Monitoring Network
                               Established 2002
                               SEP funding
                               Existing Public Sites
                               $15,000 - $20,000 per Site
                               Currently 6 sites operating
                               7 more in development
Public Health & Environmental
           Services
Pollution Control Division



                  Ozone Monitor Reporting
                         Logistics
                      Site selection
                      Monitors – EPA equivalent method
                      Data loggers – TCEQ network OK
                      Phone modem / standing IP address
                      Coordination of installation
                      QA/QC program
Public Health & Environmental
           Services
Pollution Control Division



             How to give Public access to
                  data generated?
                               Internet search
                               Email alert system
                               Monitor remote digital displays
                               Press releases
Public Health & Environmental
           Services
Pollution Control Division




            Air Quality Health Advisory

                            Air Quality in Harris County
                               (Reaches/May Reach)
                                     Level Red
Public Health & Environmental
           Services
Pollution Control Division




            Air Quality Warning/Health Advisory


                          Air Quality in Harris County
                          Reaches Level Red with the
                          Possibility of Reaching Level
                                      Purple
Public Health & Environmental
           Services
Pollution Control Division



                     Ozone Forecasts and
                    Warnings E-mail Alerts
                TCEQ –
                 http:www.tceq.state.tx/cgi-
                 bin/monops/select_curlev?region12_cur.gif
                Harris County Office of Emergency
                 Management
                 http://ozone.hcoem.org
                    Click “Subscribe to Ozone Alerts”
How do you choose the monitors you want to
  receive ozone exceedance reports on?
         http://ozone.hcoem.org
How do you choose the monitors you want
   to receive exceedance reports on?
        http://ozone.hcoem.org
Identify the monitors of interest to you:
        http://ozone.hcoem.org
Use the drop-down boxes to
   choose the monitors:
  http://ozone.hcoem.org
  Air Quality Reference Guide
 for the Houston-Galveston Area

www.hgac.cog.tx.us/transportation
Public Health & Environmental
           Services
Pollution Control Division
                                More information
                 Texas Commission On Environmental
                  Quality: www.tceq.state.tx.us
                 Houston-Galveston Area Council:
                  www.hgac.cog.tx.us
                 Harris County Pollution Control
                  www.hd.co.harris.tx.us/pcd/pcd.htm:
                 Jerry Harris-Air Sampling Coordinator
                  ( 713 ) 920-2831

				
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posted:10/7/2011
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